The Hitachi ZAXIS 3 Series excavators, including the ZX 160LC-3, ZX 180LC-3, and ZX 180LCN-3 models, represent robust and reliable construction equipment engineered for demanding tasks. These machines are powered by efficient diesel engines, typically Isuzu or Hino variants, offering substantial net power and displacement suitable for a wide range of applications. Their hydrostatic transmissions ensure smooth operation and precise control, while features like hydrostatic travel speeds and specific undercarriage dimensions, such as track gauge, highlight their adaptability to various job site conditions. The engineering quality and durability of the ZAXIS line are designed to provide long-term service and operational efficiency. This Service Repair Manual provides comprehensive guidance for the maintenance, repair, and technical understanding of the Hitachi ZAXIS 3 Series excavators. It covers essential areas including detailed engine specifications, hydrostatic transmission operation, fluid capacities for engine oil, hydraulic fluid, and fuel, along with recommended maintenance intervals for filters. Safety guidelines and technical specifications for components like boom and arm lengths are also included. This manual is an indispensable resource for owners, mechanics, and technicians seeking to ensure optimal performance, longevity, and safe operation of their Hitachi excavators through proper upkeep and informed repairs.